Improvement in photographic-plate holders



MH Le b Ha P h .01 a Ema No. 199,491. Patented Jan. 22, 1878.

UNITED STATES. PATENT" OFFICE.

BENJAMIN F. BALTZLY, or MONTREAL, UE Eo, CANADA.

IMPROVEMENT IN PHOTOGRAPHlC-PLATE HOLDERS.

Specification forming part of Letters Patent No. 199,491, dated January22, 1878; application filed November 2, 1877.

To all whom it may concern:

Be it known that I, BENJAMIN F. BALTZLY, of Montreal, in the Province ofQuebec and Dominion of Canada, have invented certain new and usefulImprovements in Plate-Holders for Photographic Cameras, of which thefollowing is a full and exact description, reference being had to theaccompanying drawing, making a part of this specification, in which-Figure 1 is a front elevation of the lower part of the plate-holder andkit-frame; Fi 2, a transverse vertical section of the same at the linea; m,- Fig. 3, a transverse section at the line g y, and Fig. 4 atransverse section at the line 2 The object of my invention is toprotect the frame and kit of the plate-holder from the destructiveeffect of the nitrate-silver, or any other solution used in thephotographic process, and for collecting and saving the said solutionsfrom wasting.

It consists in providing the frame and kits with cornerpieces, troughs,and receivingvessel, made as herein shown and described, of vitreous,hard-rubber, or other suit-able material, the corner-pieces beingadapted and arranged so as to conduct the solution escaping from theplates into the vitreous troughs (inserted in the wood-work) and thenceinto the receiving vessel, constructed as hereinafter described, toretain the liquid in such manner that it will not be spilled when theframe is tuned sidewise.

As shown in the drawing, A represents the wooden frame, having in itslower angles the corner-pieces B, made of glass, earthenware, hardrubber, or other non-absorbent material that will repel the corrodingaction of the solution. These corner-pieces are construeted in suchshape as to form a gutter, to carry off and discharge the liquid into areceiving-trough in the manner hereinafter described, and for thispurpose I commonly make them with the standing flanges b at their frontand rear faces, to form the gutter 22 These corn er-pieces I usuallyconstruct withthe front flange and gutter cut into steps, as shown inFig. 1, so as to adapt them for the reception of the negative plateseither in a vertical or a horizontal position, as may be required by thecharacter of the picture to be taken, thereby constituting them as whatare known as reversible corners. They are provided with flanges, points,or any other suitable devices for securing them to the wooden frame, andwith points b for connecting them with a trough, in such manner that theline of the gutter will be continued into the trough.

G is a trough, which, like the corner-pieces, may be made of anysuitable repellent material. It is inserted in the lower part of thewooden frame, and is provided with a groove or gutter inclining downwardtoward its center, where it is provided with a discharge pipe or outlet,0. The points b of the corner-pieces enter the groove of the trough O atits ends, and in this manner the continuity of the gutter from the upperpart of the corner-pieces to the outlet 0 is preserved, to affordperfect drainage for the solution escaping from the plate, and toprevent it from coming into contact with the woodwork of the frame A.

From the trough O, by the outlet 0, the solution is discharged into thereceiving-vessel D, which is constructed with an open mouth, (7, at thecenter of its length. It is fixed in a hori zontal position within theframe A, its mouth 01 being uppermost, and arranged so as to receive thedischarge from the outlet 0. By placing its mouth in the center of itslength, the plate-holder may be turned down sidewise on either sidewithout any danger of discharging the solution collected therein, whichaccident is of frequent occurrence with a receiver having its mouth atone end.

A is a kit or frame for taking a smaller negative. It is held by thecorner-pieces of the frame A while in use, and is provided withcorner-pieces B, which are constructed with gutters 1), similar to thecorner-pieces of the frame A, and disclnrge into the trough C, which, byits outlet 0, discharges the solution into the trough G, and thence, ashereinbefore described, into the receiving-vessel D.

Instead of forming the gutters b of the cor ner-pieees by means of thestanding flanges b, as shown in the drawing, it is manifest that thesame result may be attained by making either a V-shaped or concavegroove in them,

v3. .The combination, with the frame A, of the detachablecorner-piecesB, provided with the groove or gutter b and projectingpoints 12 as hereinbefore described, the trough O, and thereceiving-vessel D, having its mouth at or near its middle, as hereinset forth.

BENJAMIN F. BALTZLY.

Witnesses: I WILLIAM H. Low, E. F. BENHAM.

